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/* SPDX-License-Identifier: LGPL-2.1-or-later */
/*
* Copyright (C) 2019, Google Inc.
*
* camera_metadata.h - libcamera Android Camera Metadata Helper
*/
#pragma once
#include <stdint.h>
#include <vector>
#include <system/camera_metadata.h>
class CameraMetadata
{
public:
CameraMetadata();
CameraMetadata(size_t entryCapacity, size_t dataCapacity);
CameraMetadata(const camera_metadata_t *metadata);
CameraMetadata(const CameraMetadata &other);
~CameraMetadata();
CameraMetadata &operator=(const CameraMetadata &other);
std::tuple<size_t, size_t> usage() const;
bool resized() const { return resized_; }
bool isValid() const { return valid_; }
bool getEntry(uint32_t tag, camera_metadata_ro_entry_t *entry) const;
template<typename T> bool entryContains(uint32_t tag, T value) const;
bool hasEntry(uint32_t tag) const;
template<typename T,
std::enable_if_t<std::is_arithmetic_v<T> ||
std::is_enum_v<T>> * = nullptr>
bool setEntry(uint32_t tag, const T &data)
{
if (hasEntry(tag))
return updateEntry(tag, &data, 1, sizeof(T));
else
return addEntry(tag, &data, 1, sizeof(T));
}
template<typename T,
std::enable_if_t<std::is_arithmetic_v<T> ||
std::is_enum_v<T>> * = nullptr>
bool addEntry(uint32_t tag, const T &data)
{
return addEntry(tag, &data, 1, sizeof(T));
}
template<typename T, size_t size>
bool addEntry(uint32_t tag, const T (&data)[size])
{
return addEntry(tag, data, size, sizeof(T));
}
template<typename S,
typename T = typename S::value_type>
bool addEntry(uint32_t tag, const S &data)
{
return addEntry(tag, data.data(), data.size(), sizeof(T));
}
template<typename T>
bool addEntry(uint32_t tag, const T *data, size_t count)
{
return addEntry(tag, data, count, sizeof(T));
}
template<typename T>
bool updateEntry(uint32_t tag, const T &data)
{
return updateEntry(tag, &data, 1, sizeof(T));
}
template<typename T, size_t size>
bool updateEntry(uint32_t tag, const T (&data)[size])
{
return updateEntry(tag, data, size, sizeof(T));
}
template<typename S,
typename T = typename S::value_type>
bool updateEntry(uint32_t tag, const S &data)
{
return updateEntry(tag, data.data(), data.size(), sizeof(T));
}
template<typename T>
bool updateEntry(uint32_t tag, const T *data, size_t count)
{
return updateEntry(tag, data, count, sizeof(T));
}
camera_metadata_t *getMetadata();
const camera_metadata_t *getMetadata() const;
private:
bool resize(size_t count, size_t size);
bool addEntry(uint32_t tag, const void *data, size_t count,
size_t elementSize);
bool updateEntry(uint32_t tag, const void *data, size_t count,
size_t elementSize);
camera_metadata_t *metadata_;
bool valid_;
bool resized_;
};
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